检索结果-内蒙古大学图书馆

Visible light excitation on CuPd/TiN with enhanced chemisorption for catalyzing Heck reaction

Chinese Chemical Letters 2025年第1期36卷 362-368页

作者： Xuhui Fan Fan Wang Mengjiao Li Faiza Meharban Yaying Li Yuanyuan Cui Xiaopeng Li Jingsan Xu Qi Xiao Wei Luo State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Beijing Key Laboratory of Ionic Liquids Clean Process Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China National Energy R&D Center for Coal to Liquid Fuels Synfuels China Technology Co.Ltd.Beijing 101407China Shimadzu(China)Co. Ltd.Shanghai 200233China School of Chemistry and Physics&Centre for Materials Science Queensland University of TechnologyBrisbaneQLD 4001Australia

In this work,we developed plasmonic photocatalyst composed of Cu Pd alloy nanoparticles supported on Ti N,the optimized Cu_(3)Pd_(2)/Ti N catalyst shows excellent conversion(>96%)and selectivity(>99%)for Heck reaction at 50℃ under visible light *** in-situ spectroscopic investigations,we find that visible light excitation could achieve stable metallic Cu species on the surface of Cu Pd alloy nanoparticles,thereby eliminating the inevitable surface oxides of Cu based *** in-situ formed metallic Cu species under irradiation take advantage of the strong interactions of Cu with visible light,and manifest in the localized surface plasmon resonances(LSPR)*** light excitation could further promote the charge transfer between catalytic Pd component and the support Ti N,resulting in electron-rich Pd sites on Cu Pd/Ti ***,light excitation on Cu Pd/Ti N generates strong chemisorption of iodobenzene and styrene,favoring the activation of reactants for Heck *** calculations suggest that electron-rich Cu Pd sites ideally lower the activation energy barrier for the coupling *** work provides valuable insights for mechanistic understanding of plasmonic photocatalysis.

关键词： Photocatalysis CuPd alloy Chemisorption Photocatalytic mechanism LSPR

来源：评论

学校读者我要写书评

暂无评论

Ru single atoms induce surface-mediated discharge in Na-O_(2)batteries

引用

Chinese Chemical Letters 2022年第1期33卷 491-496页

作者： Xin Jin Yangyang Li Shuo Zhang Jiangwei Zhang Zihan Shen Chenlin Zhong Ziqiang Cai Chaoquan Hu Huigang Zhang National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced MicrostructuresCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210093China Dalian National Laboratory for Clean Energy&State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of Sciences(CAS)Dalian 116023China State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Nanjing IPE Institute of Green Manufacturing Industry Nanjing 211100China

Sodium(Na)O_(2)batteries have high energy density and low ***,high polarization,complex discharge products,and low Coulombic efficiency(CE)lead to poor ***,we proposed an atomically dispersed Ru catalyst on nitrogen-doped graphene for Na-O_(2)*** catalysts enable the discharge to proceed via a surface-mediated route,which leads to uniform deposition of Na_(2-x)O_(2)and low polarization during *** first-principle calculation revealed that Ru-N_(4)complex in the catalyst has strong chemical adsorption to intermediate superoxides,facilitating uniform deposition and enhancing rapid *** contrast,Ru nanoparticles,despite the catalytic activity,induce bulk deposition via a solution-mediated route because the exposed graphene surface shows weak interaction to superoxides,thereby lowering CEs and *** brief,the atomically-dispersed Ru catalyst endows Na-O_(2)batteries with excellent electrochemical properties via a surface-mediated discharge.

关键词： Na-O_(2)batteries Ru single atoms Surface-mediated mechanism Adsorption energy Co-deposition

来源：评论

学校读者我要写书评

暂无评论

Co nanoparticles confined in mesopores of MFI zeolite for selective syngas conversion to heavy liquid hydrocarbon fuels

引用

Chinese Journal of Catalysis 2025年第1期68卷 246-258页

作者： Neng Gong Quanzheng Deng Yujiao Wang Zitao Wang Lu Han Peng Wu Shun'ai Che School of Chemical Science and Engineering Tongji UniversityShanghai 200092China Multi-scale Porous Materials Center Institute of Advanced Interdisciplinary Studies&School of Chemistry and Chemical EngineeringChongqing UniversityChongqing 400044China State Key Laboratory of Inorganic Synthesis&Preparative Chemistry Jilin UniversityChangchun 130015JilinChina Shanghai Key Laboratory of Green Chemistry and Chemical Processes State Key Laboratory of Petroleum Molecular&Process EngineeringSchool of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200062China School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesState Key Laboratory of Metal Matrix CompositesShanghai Key Laboratory for Molecular Engineering of Chiral DrugsShanghai Jiao Tong UniversityShanghai 200240China

Designing Fischer-Tropsch synthesis(FTS)catalysts to selectively produce liquid hydrocarbon fuels is a crucial ***,we selectively introduced Co nanoparticles(NPs)into the micropores and mesopores of an ordered mesoporous MFI zeolite(OMMZ)through impregnation,which controlled the carbon number distribution in the FTS products by tuning the position of catalytic active sites in differently sized *** Co precursors coordinated by acetate with a size of 9.4×4.2×2.5Åand by 2,2'-bipyridine with a size of 9.5×8.7×7.9Å,smaller and larger than the micropores(ca.5.5Å)of MFI,made the Co species incorporated in OMMZ's micropores and mesopores,*** carbon number products synthesized with the Co NPs confined in mesopores were larger than that in *** high jet and diesel selectivities of 66.5%and 65.3%were achieved with Co NPs confined in micropores and mesopores of less acidic Na-type OMMZ,*** and jet selectivities of 76.7%and 70.8%were achieved with Co NPs confined in micropores and mesopores of H-type OMMZ with Brönsted acid sites,respectively.A series of characterizations revealed that the selective production of diesel and jet fuels was due to the C-C cleavage suppressing of heavier hydrocarbons by the Co NPs located in mesopores.

关键词： Fischer-Tropsch synthesis Heavy liquid hydrocarbon fuel Co nanoparticle Ordered mesoporous MFI zeolite C-C cleavage

来源：评论

学校读者我要写书评

暂无评论

Gas-phase synthesis of Ti_(2)CCl_(2) enables an efficient catalyst for lithiumsulfur batteries

引用

The Innovation 2024年第1期5卷 33-40页

作者： Maoqiao Xiang Zihan Shen Jie Zheng Miao Song Qiya He Yafeng Yang Jiuyi Zhu Yuqi Geng Fen Yue Qinghua Dong Yu Ge Rui Wang Jiake Wei Weiliang Wang Haiming Huang Huigang Zhang Qingshan Zhu Chuanfang John Zhang State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of the Chinese Academy of SciencesBeijing 100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China China Nuclear Power Engineering Co. Ltd.117 West Third Ring RoadNorth SectionBeijing 100840China College of Materials Science&Engineering Sichuan UniversityChengdu 610065China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China School of Physics Guangdong Province Key Laboratory of Display Material and TechnologyCenter for Neutron Science and TechnologySun Yat-sen UniversityGuangzhou 510275China Solid State Physics&Material Research Laboratory School of Physics and Materials ScienceGuangzhou UniversityGuangzhou 510006China

MXenes have aroused intensive enthusiasm because of their exotic properties and promising ***,to date,they are usually synthesized by etching *** synthetic technologies provides more opportunities for innovation and may extend unexplored ***,we report a bottom-up gas-phase synthesis of Cl-terminated MXene(Ti_(2)CCl_(2)).The gas-phase synthesis endows Ti_(2)CCl_(2) with unique surface chemistry,high phase purity,and excellent metallic conductivity,which can be used to accelerate polysulfide conversion kinetics and dramatically prolong the cyclability of Li-S ***-depth mechanistic analysis deciphers the origin of the formation of Ti_(2)CCl_(2) and offers a paradigm for tuning MXene chemical vapor *** brief,the gas-phase synthesis transforms the synthesis of MXenes and unlocks the hardly achieved potentials of MXenes.

关键词： synthesis phase lithium

来源：评论

学校读者我要写书评

暂无评论

Ultrasonic enhancement of persulfate oxidation system governs emerging pollutants decontamination

引用

Green Energy & Environment 2024年第11期9卷 1666-1678页

作者： Yanpan Li Yanbo Zhou Yi Zhou National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical ProcessEast China University of Science and Technology130 Meilong RoadShanghai200237China Shanghai Engineering Research Center for Multi-media Environmental Catalysis and Resource Utilization East China University of Science and Technology130 Meilong RoadShanghai200237China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092China

Emerging contaminants (ECs) are widely present in aquatic environments, posing potential risks to both ecosystems and human health. Theultrasound-assisted persulfate oxidation process has attracted considerable attention in the degradation of ECs due to its ability to generate bothsulfate radicals and cavitation effects, enhancing degradation effects. In this paper, the principle of ultrasonic synergistic Fenton-like oxidationsystem for degrading organic pollutants was reviewed, divided into homogeneous system, non-homogeneous system, and single-atom system toexplore the synergistic effect of ultrasound-enhanced persulfate technology in three aspects, and the effects of environmental factors such asultrasonic frequency and power, system pH, temperature, and initial oxidant concentration on the system's decontamination performance werediscussed. Finally, future research on ultrasonically activated persulfate technology is summarized and prospected.

关键词： Ultrasound Persulfate Emerging contaminants Reaction mechanism Synergistic effects

来源：评论

学校读者我要写书评

暂无评论

Universality class of machine learning for critical phenomena

引用

Science China(Physics,Mechanics & Astronomy) 2023年第12期66卷 63-70页

作者： Gaoke Hu Yu Sun Teng Liu Yongwen Zhang Maoxin Liu Jingfang Fan Wei Chen Xiaosong Chen School of Systems Science and Institute of Nonequilibrium Systems Beijing Normal UniversityBeijing 100875China Data Science Research Center Faculty of ScienceKunming University of Science and TechnologyKunming 650500China State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Herein,percolation phase transitions on a two-dimensional lattice were studied using machine learning *** reveal that different phase transitions belonging to the same universality class can be identified using the same neural networks(NNs),whereas phase transitions of different universality classes require different *** on this finding,we proposed the universality class of machine learning for critical ***,we investigated and discussed the NNs of different universality *** research contributes to machine learning by relating the NNs with the universality class.

关键词： universality class machine learning percolation

来源：评论

学校读者我要写书评

暂无评论

Assembly Induced Super-Large Red-Shifted Absorption:The Burgeoning Field of Organic Near-Infrared Materials

引用

CCS Chemistry 2021年第5期3卷 678-693页

作者： Luyang Zhao Xiaokang Ren Xuehai Yan State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190 School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049 Centerfor Mesoscience Institute of Process Engineering Chinese Academy of Sciences Beijing 100190

Supramolecular assembly of organic dye compounds with J-aggregation leads to a red-shifted absorption spectrum that greatly facilitates the construction of near-infrared(NIR)materials.A considerable improvement of the material functions requires that the absorption red-shift be larger than 100 nm,but such a super-large red-shift is challenging,and the rules leading to the super-large red-shifted absorption is still not *** this review,we focused on those J-aggregated organic dye materials with super-large red-shifted *** nature of the super-large red-shift is originated fromthe intermolecular charge transfer between neighboring *** super-large red-shift can be obtained by tuning either the molecular structure or kinetic assembly process in a delicate *** with super-large red-shifted absorption have been successfully applied to biological imaging,phototherapy,electronic devices,and solar cells,and show great potential in many other *** elaboration of assembly induced super-large red-shifted absorption is promising for design of supramolecular NIR materials with tuned structures,enhanced functionalities,and a wide array of applications.

关键词： super-large red-shifted absorption intermolecular charge transfer supramolecular assembly kinetic self-assembly organic near-infrared materials

来源：评论

学校读者我要写书评

暂无评论

Estimating Hansen solubility parameters of organic pigments by group contribution methods

引用

Chinese Journal of Chemical engineering 2021年第3期34卷 186-197页

作者： Markus Enekvist Xiaodong Liang Xiangping Zhang Kim Dam-Johansen Georgios MKontogeorgis Center for Energy Resources Engineering(CERE) Department of Chemical and Biochemical EngineeringTechnical University of DenmarkBuilding 229Søltofts Plads 229DK-2800 Kgs.LyngbyDenmark Hempel Foundation Coatings Science and Technology Centre(CoaST) Department of Chemical and Biochemical EngineeringTechnical University of DenmarkBuilding 229Søltofts Plads 229DK-2800 Kgs.LyngbyDenmark Sino-Danish Center for Education and Research(SDC) IPEUniversity of Chinese Academy of SciencesBeijing 100049China Beijing Key Laboratory of Ionic Liquids Clean Process CAS Key Laboratory of Green Process and EngineeringState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China

The Hansen solubility parameters(HSP)are frequently used for solvent selection and characterization of polymers,and are directly related to the suspension behavior of pigments in solvent *** performance of currently available group contribution(GC)methods for HSP were evaluated and found to be insufficient for computer-aided product design(CAPD)of paints and coatings.A revised and,for this purpose,improved GC method is presented for estimating HSP of organic compounds,intended for organic *** to the significant limitations of GC methods,an uncertainty analysis and parameter confidence intervals are provided in order to better quantify the estimation accuracy of the proposed *** to other applicable GC methods,the prediction error is reduced significantly with average absolute errors of 0.45 MPa^(1/2),1.35 MPa^(1/2),and 1.09 MPa^(1/2) for the partial dispersion(δD),polar(δP)and hydrogen-bonding(δH)solubility parameters respectively for a database of 1106 *** performance for organic pigments is comparable to the overall method performance,with higher average errors forδD and lower average errors forδP andδH.

关键词： Hansen solubility parameters Group contribution method Organic pigments Computer-aided product design Parameter estimation Uncertainty analysis

来源：评论

学校读者我要写书评

暂无评论

Assembly and Jamming of Polar Additive-Swollen Microgels at Liquid-Liquid Interfaces: From Inverse Pickering Emulsions to Hierarchical Functional Materials

SSRN

引用

SSRN 2024年

作者： Ngai, To Guan, Xin Liu, Yang Xia, Yufei Tse, Ying-Lung Steve Department of Chemistry The Chinese University of Hong Kong Shatin Hong Kong College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu610065 China State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China

HypothesisPoly-N-isopropylacrylamide (PNIPAM)-based microgels have attracted considerable attention as soft particulate stabilizers because of their deformability and functionality. However, the intrinsic hydrophilicity of microgel limits their applications in stabilizing water-in-oil (W/O) Pickering emulsions. Using various polar additives can improve the hydrophobicity of microgels, thus unlocking new possibilities in inverse Pickering emulsion formation and materials *** types of microgels were synthesized through free-radical precipitation polymerization with tailored physiochemical properties. The effect of various polar additives on the wettability, adsorption kinetics and interfacial behaviors of microgels were systematically investigated. Inverse W/O Pickering emulsions stabilized by additive-swollen microgels were utilized as template for the fabrication of functional materials with dual-stimuli responsiveness and hierarchical ***-swollen PNIPAM-based microgels exhibited enhanced hydrophobicity and superior emulsifying capability, which spontaneously assembled and jammed at oil-water interfaces, thereby significantly reducing the interfacial energy and forming a densely packed, elastic and responsive microgel monolayer. The feasibility of the strategy was verified for the formation of inverse W/O Pickering emulsions and high internal phase Pickering emulsions (HIPPEs). More importantly, this simple formation strategy of microgel-stabilized inverse W/O Pickering emulsions provided a new platform for the fabrication of functional materials with tunable inner structures from microscale (e.g., dual-stimuli core-shell microgels) to macroscale (e.g., hierarchical porous materials) that can be used for potential applications, such as recyclable contaminant removal and biosensing. © 2024, The Authors. All rights reserved.

关键词： Functional materials

来源：评论

学校读者我要写书评

暂无评论

Structural architectures of polymer proton exchange membranes suitable for high-temperature fuel cell applications

引用

Science China Materials 2022年第2期65卷 273-297页

作者： Junming Dai Yu Zhang Gang Wang Yongbing Zhuang State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemistry and Chemical Engineering Henan University of TechnologyZhengzhou 450001China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China

High-temperature proton exchange membrane(HT-PEM)fuel cells offer more advantages than low-temperature PEM fuel *** ideal characteristics of HT-PEMs are high conductivities,low-humidity operation conditions,adequate mechanical properties,and competitive *** molecular moieties,such as benzimidazole,benzothiazole,imide,and ether ether ketone,have been introduced to polymer chain backbones to satisfy the application requirements for *** most common sulfonated polymers based on the main chain backbones have been employed to improve the *** group/chain engineering,including the introduction of SO_(3)^(-) on the side chain,grafting,branching,and crosslinking,has been widely applied to HTPEMs to further improve their proton conductivity,thermal stability,and mechanical ***,phosphoric acid-doped polybenzimidazole is the most successful polymer material for application in *** compositing/blending modification methods of polymers are effective in obtaining high PA-doping levels and superior mechanical *** this review,the current progress of various membrane materials used for HT-PEMs is *** synthesis and performance characteristics of polymers containing specific moieties in the chain backbones applied to HT-PEMs are discussed *** modification approaches and their deficiencies associated with HT-PEMs are analyzed and *** and future challenges are also presented.

关键词： proton exchange membranes high-temperature fuel cells structure-performance relationship proton conductivity

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：